When I try to run the :specs group, I would expect guard to run Spork for Rspec only.

guard -g specs start

However, I can see from the output that guard runs Spork both for Rspec and Cucumber.

~/current[master]% guard -g specs start
WARNING: You are using Guard outside of Bundler, this is dangerous and may not work. Using `bundle exec guard` is safer.
Guard could not detect any of the supported notification libraries.
Guard is now watching at '/Users/rupert/Desktop/cws-rails'
Starting Spork for RSpec & Cucumber
Using RSpec
Using Cucumber
Preloading Rails environment
Preloading Rails environment
Loading Spork.prefork block...
Loading Spork.prefork block...
Spork is ready and listening on 8990!
Spork is ready and listening on 8989!
Spork server for RSpec & Cucumber successfully started
Guard::RSpec is running, with RSpec 2!
Running all specs